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  • 1
    Electronic Resource
    Electronic Resource
    Tape Casting of Lanthanum Chromite (1997)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 80 (1997), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The effects of process additives, ball milling, and solids loading were evaluated for tape casting suspensions of glycinenitrate-synthesized La0.7Ca0.31CrO3 powder. An optimized formulation was obtained based on rheological characterization, electrokinetic sonic amplitude measurements, qualitative examination of green tapes, and the sintered microstructure. The tape casting formulation incorporated 66:34 methyl ethyl ketone/ethyl alcohol solvent, an aliphatic phosphate ester dispersant, and 80 wt% (35 vol%) solids. The best binder/plasticizer system was 12 wt% (15 vol%) poly(isobutyl methacrylate) and 5 wt% (6.3 vol%) benzyl butyl phthalate plasticizer (binder:plasticizer = 2.3). Cast tapes were sintered at 1300°C for 2 h, producing a bulk density of 96.2% theoretical, with linear shrinkage of 22% and an approximate grain size of 1.3 μm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1997.tb02805.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mechanical Properties of La1-xSrxCo0.2Fe0.8O3 Mixed-Conducting Perovskites Made by the Combustion Synthesis Technique (2000)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 83 (2000), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: This paper examined the room-temperature mechanical properties of a mixed-conducting perovskite La1–xSrxCo0.2Fe0.8O3 (x= 0.2–0.8). Powders were made by the combustion synthesis technique and sintered at 1250°C in air. Sintered density, crystal phase, and grain size were characterized. Young's and shear moduli, microhardness, indentation fracture toughness, and biaxial flexure strength were determined. The Young's and shear moduli slightly increased with increasing strontium content. Young's modulus of 151–188 GPa and shear modulus of 57–75 GPa were measured. Biaxial flexure strength of ∼160 MPa was measured for lower strontium content batches. Strength greatly decreased to ∼40 MPa at higher strontium concentrations (x= 0.6–0.8) because of the formation of extensive cracking. Indentation toughness showed a higher value (∼1.5 MPa·m1/2) for low strontium (x= 0.2) content and a lower value (∼1.1 MPa·m1/2) for the other batches (x= 0.4–0.8). Materials with fine and coarse grain size were also tested at various indent loads and showed no dependence of toughness on crack size. In addition, fractography was used to characterize the critical flaw and fracture mode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2000.tb01410.x
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  • 3
    Electronic Resource
    Electronic Resource
    Phase Transitions and Transient Liquid-Phase Sintering in Calcium-Substituted Lanthanum Chromite (1997)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 80 (1997), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: This paper investigates sintering and phase transitions of La0.7CaxCrO3(0.25≥x≥0.35), a material useful as electrical interconnections in solid oxide fuel cells. Heating of the quenched, metastable single-phase chromite resulted in exsolution of CaCrO4 due to Ca solubility limitations below 1200°C. A transient liquid phase formed between 850° and 1000°C as the CaCrO4 melted, causing partial densification in materials having 0.25 〈 x 〈 0.30. A slight increase in Ca content induced an additional liquid-phase sintering event, likely due to melting of Ca3(CrO4)2, which facilitated near-complete densification by 1250°C. After enhancing sintering, the secondary phases redissolved into the chromite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1997.tb03095.x
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  • 4
    Electronic Resource
    Electronic Resource
    Application of the Carreau Model to Tape-Casting Fluid Mechanics (1997)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 80 (1997), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Tape-casting experiments were conducted with 30 different aqueous suspensions whose viscosities were functions of strain rate. Tape thickness measurements of the resulting casts varied from 180 to 310 μ m. The three-parameter Carreau model accurately conformed to the rheological data of the suspensions between 0.46 and 581 s−1. With this model, the zero-shear-rate viscosities of the various suspensions ranged from 20 to 2 × 105 mPa·s. Within the framework of the Carreau model, the equations of motion for the flow of the suspension through the doctor blade were solved numerically. Calculated thicknesses were in very good agreement with experimental measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1997.tb03244.x
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  • 5
    Electronic Resource
    Electronic Resource
    EFFECTS OF BRAN ON SENSORY, STORAGE, AND COMPOSITIONAL PROPERTIES OF LOW FAT BEEF SLOPPY-JOES (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of muscle foods 4 (1993), S. 0 
    Details
    ISSN: 1745-4573
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Different sources of bran were used as replacements for fat in beef sloppy-joe products. Five low fat (approximately 2.5%) products were formulated to include 5% or 10% wheat bran, 5% or 10% barley bran and a control. Also, a high fat control (12.61%) was produced. These products were evaluated at 0, 5, and 10 weeks of freezer storage. In general, the fiber added products were found to be inferior (P 〈 0.05) in flavor, juiciness, mouth feel and overall acceptability when compared to the high and low fat control products. TBA values displayed fluctuations (P 〈 0.05) over the storage times evaluated, but among treatments and over storage times values were very low.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4573.1993.tb00492.x
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  • 6
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    Unknown
    Bordetella pertussis FbpA Binds Both Unchelated Iron and Iron Siderophore Complexes (2014)
    American Chemical Society (ACS)
    Details
    Publication Date: 2014-06-14
    Description: Biochemistry DOI: 10.1021/bi5002823
    Print ISSN: 0006-2960
    Electronic ISSN: 1520-4995
    Topics: Biology , Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
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  • 7
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    Linking Precursor Alterations to Nanoscale Structure and Optical Transparency in Polymer Assisted Fast-Rate Dip-Coating of Vanadium Oxide Thin Films (2015)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2015-07-01
    Description: Solution processed metal oxide thin films are important for modern optoelectronic devices ranging from thin film transistors to photovoltaics and for functional optical coatings. Solution processed techniques such as dip-coating, allow thin films to be rapidly deposited over a large range of surfaces including curved, flexible or plastic substrates without extensive processing of comparative vapour or physical deposition methods. To increase the effectiveness and versatility of dip-coated thin films, alterations to commonly used precursors can be made that facilitate controlled thin film deposition. The effects of polymer assisted deposition and changes in solvent-alkoxide dilution on the morphology, structure, optoelectronic properties and crystallinity of vanadium pentoxide thin films was studied using a dip-coating method using a substrate withdrawal speed within the fast-rate draining regime. The formation of sub-100 nm thin films could be achieved rapidly from dilute alkoxide based precursor solutions with high optical transmission in the visible, linked to the phase and film structure. The effects of the polymer addition was shown to change the crystallized vanadium pentoxide thin films from a granular surface structure to a polycrystalline structure composed of a high density of smaller in-plane grains, resulting in a uniform surface morphology with lower thickness and roughness. Scientific Reports 5 doi: 10.1038/srep11574
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Nature Publishing Group (NPG)
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